Mini design with hanging lanyard. This 3 in 1 Carbon monixide detector is mini design with dimensions: about 85 x 50.6 x 17mm. It is so convenient to carry it or hang it to anywhereElectrochemistry working . More accurate detection of carbon monoxide. There is no delay, real-time monitoring, and data is refreshed every 2 seconds shows on the color HD 1.9inch screen, so that you can always know the air quality of the environment.Larger detection range: CO range: 0 to 1000PPM; Humidity range: 0% to 95%RH; The cycle alarm works when the CO is over 50ppm.Built-in 1000 mAh rechargable battery. Come with one type-c USB, this carbon monoxide detector can continue working 50 hours when charging ful.Portable Designed. Perfect for outdoor and indoor activities, camping tents, boats, aircraft, stove heating, vehicles, and other confined spaces. It is so good helper .Color: OrangeMaterial: plasticPackage Contents:1 x carbon monoxide monitor1 x lanyard1 x English manual1 x usb cableOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.